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Commit | Line | Data |
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7a3c66e2 DS |
1 | /* |
2 | * Micrel KS8695 (Centaur) Ethernet. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License as | |
6 | * published by the Free Software Foundation; either version 2 of the | |
7 | * License, or (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * Copyright 2008 Simtec Electronics | |
15 | * Daniel Silverstone <dsilvers@simtec.co.uk> | |
16 | * Vincent Sanders <vince@simtec.co.uk> | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/ioport.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/etherdevice.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/skbuff.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/crc32.h> | |
27 | #include <linux/mii.h> | |
28 | #include <linux/ethtool.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/platform_device.h> | |
31 | #include <linux/irq.h> | |
7a3c66e2 DS |
32 | #include <linux/io.h> |
33 | ||
34 | #include <asm/irq.h> | |
35 | ||
36 | #include <mach/regs-switch.h> | |
37 | #include <mach/regs-misc.h> | |
31b73ab3 F |
38 | #include <asm/mach/irq.h> |
39 | #include <mach/regs-irq.h> | |
7a3c66e2 DS |
40 | |
41 | #include "ks8695net.h" | |
42 | ||
43 | #define MODULENAME "ks8695_ether" | |
68d8287c | 44 | #define MODULEVERSION "1.02" |
31b73ab3 | 45 | |
7a3c66e2 DS |
46 | /* |
47 | * Transmit and device reset timeout, default 5 seconds. | |
48 | */ | |
49 | static int watchdog = 5000; | |
50 | ||
51 | /* Hardware structures */ | |
52 | ||
53 | /** | |
54 | * struct rx_ring_desc - Receive descriptor ring element | |
55 | * @status: The status of the descriptor element (E.g. who owns it) | |
56 | * @length: The number of bytes in the block pointed to by data_ptr | |
57 | * @data_ptr: The physical address of the data block to receive into | |
58 | * @next_desc: The physical address of the next descriptor element. | |
59 | */ | |
60 | struct rx_ring_desc { | |
61 | __le32 status; | |
62 | __le32 length; | |
63 | __le32 data_ptr; | |
64 | __le32 next_desc; | |
65 | }; | |
66 | ||
67 | /** | |
68 | * struct tx_ring_desc - Transmit descriptor ring element | |
69 | * @owner: Who owns the descriptor | |
70 | * @status: The number of bytes in the block pointed to by data_ptr | |
71 | * @data_ptr: The physical address of the data block to receive into | |
72 | * @next_desc: The physical address of the next descriptor element. | |
73 | */ | |
74 | struct tx_ring_desc { | |
75 | __le32 owner; | |
76 | __le32 status; | |
77 | __le32 data_ptr; | |
78 | __le32 next_desc; | |
79 | }; | |
80 | ||
81 | /** | |
82 | * struct ks8695_skbuff - sk_buff wrapper for rx/tx rings. | |
83 | * @skb: The buffer in the ring | |
84 | * @dma_ptr: The mapped DMA pointer of the buffer | |
85 | * @length: The number of bytes mapped to dma_ptr | |
86 | */ | |
87 | struct ks8695_skbuff { | |
88 | struct sk_buff *skb; | |
89 | dma_addr_t dma_ptr; | |
90 | u32 length; | |
91 | }; | |
92 | ||
93 | /* Private device structure */ | |
94 | ||
95 | #define MAX_TX_DESC 8 | |
96 | #define MAX_TX_DESC_MASK 0x7 | |
97 | #define MAX_RX_DESC 16 | |
98 | #define MAX_RX_DESC_MASK 0xf | |
99 | ||
68d8287c F |
100 | /*napi_weight have better more than rx DMA buffers*/ |
101 | #define NAPI_WEIGHT 64 | |
102 | ||
7a3c66e2 DS |
103 | #define MAX_RXBUF_SIZE 0x700 |
104 | ||
105 | #define TX_RING_DMA_SIZE (sizeof(struct tx_ring_desc) * MAX_TX_DESC) | |
106 | #define RX_RING_DMA_SIZE (sizeof(struct rx_ring_desc) * MAX_RX_DESC) | |
107 | #define RING_DMA_SIZE (TX_RING_DMA_SIZE + RX_RING_DMA_SIZE) | |
108 | ||
109 | /** | |
110 | * enum ks8695_dtype - Device type | |
111 | * @KS8695_DTYPE_WAN: This device is a WAN interface | |
112 | * @KS8695_DTYPE_LAN: This device is a LAN interface | |
113 | * @KS8695_DTYPE_HPNA: This device is an HPNA interface | |
114 | */ | |
115 | enum ks8695_dtype { | |
116 | KS8695_DTYPE_WAN, | |
117 | KS8695_DTYPE_LAN, | |
118 | KS8695_DTYPE_HPNA, | |
119 | }; | |
120 | ||
121 | /** | |
122 | * struct ks8695_priv - Private data for the KS8695 Ethernet | |
123 | * @in_suspend: Flag to indicate if we're suspending/resuming | |
124 | * @ndev: The net_device for this interface | |
125 | * @dev: The platform device object for this interface | |
126 | * @dtype: The type of this device | |
127 | * @io_regs: The ioremapped registers for this interface | |
68d8287c | 128 | * @napi : Add support NAPI for Rx |
7a3c66e2 DS |
129 | * @rx_irq_name: The textual name of the RX IRQ from the platform data |
130 | * @tx_irq_name: The textual name of the TX IRQ from the platform data | |
131 | * @link_irq_name: The textual name of the link IRQ from the | |
132 | * platform data if available | |
133 | * @rx_irq: The IRQ number for the RX IRQ | |
134 | * @tx_irq: The IRQ number for the TX IRQ | |
135 | * @link_irq: The IRQ number for the link IRQ if available | |
136 | * @regs_req: The resource request for the registers region | |
137 | * @phyiface_req: The resource request for the phy/switch region | |
138 | * if available | |
139 | * @phyiface_regs: The ioremapped registers for the phy/switch if available | |
140 | * @ring_base: The base pointer of the dma coherent memory for the rings | |
141 | * @ring_base_dma: The DMA mapped equivalent of ring_base | |
142 | * @tx_ring: The pointer in ring_base of the TX ring | |
143 | * @tx_ring_used: The number of slots in the TX ring which are occupied | |
144 | * @tx_ring_next_slot: The next slot to fill in the TX ring | |
145 | * @tx_ring_dma: The DMA mapped equivalent of tx_ring | |
146 | * @tx_buffers: The sk_buff mappings for the TX ring | |
147 | * @txq_lock: A lock to protect the tx_buffers tx_ring_used etc variables | |
148 | * @rx_ring: The pointer in ring_base of the RX ring | |
149 | * @rx_ring_dma: The DMA mapped equivalent of rx_ring | |
150 | * @rx_buffers: The sk_buff mappings for the RX ring | |
151 | * @next_rx_desc_read: The next RX descriptor to read from on IRQ | |
68d8287c | 152 | * @rx_lock: A lock to protect Rx irq function |
7a3c66e2 DS |
153 | * @msg_enable: The flags for which messages to emit |
154 | */ | |
155 | struct ks8695_priv { | |
156 | int in_suspend; | |
157 | struct net_device *ndev; | |
158 | struct device *dev; | |
159 | enum ks8695_dtype dtype; | |
160 | void __iomem *io_regs; | |
161 | ||
31b73ab3 F |
162 | struct napi_struct napi; |
163 | ||
7a3c66e2 DS |
164 | const char *rx_irq_name, *tx_irq_name, *link_irq_name; |
165 | int rx_irq, tx_irq, link_irq; | |
166 | ||
167 | struct resource *regs_req, *phyiface_req; | |
168 | void __iomem *phyiface_regs; | |
169 | ||
170 | void *ring_base; | |
171 | dma_addr_t ring_base_dma; | |
172 | ||
173 | struct tx_ring_desc *tx_ring; | |
174 | int tx_ring_used; | |
175 | int tx_ring_next_slot; | |
176 | dma_addr_t tx_ring_dma; | |
177 | struct ks8695_skbuff tx_buffers[MAX_TX_DESC]; | |
178 | spinlock_t txq_lock; | |
179 | ||
180 | struct rx_ring_desc *rx_ring; | |
181 | dma_addr_t rx_ring_dma; | |
182 | struct ks8695_skbuff rx_buffers[MAX_RX_DESC]; | |
183 | int next_rx_desc_read; | |
31b73ab3 | 184 | spinlock_t rx_lock; |
7a3c66e2 DS |
185 | |
186 | int msg_enable; | |
187 | }; | |
188 | ||
189 | /* Register access */ | |
190 | ||
191 | /** | |
192 | * ks8695_readreg - Read from a KS8695 ethernet register | |
193 | * @ksp: The device to read from | |
194 | * @reg: The register to read | |
195 | */ | |
196 | static inline u32 | |
197 | ks8695_readreg(struct ks8695_priv *ksp, int reg) | |
198 | { | |
199 | return readl(ksp->io_regs + reg); | |
200 | } | |
201 | ||
202 | /** | |
203 | * ks8695_writereg - Write to a KS8695 ethernet register | |
204 | * @ksp: The device to write to | |
205 | * @reg: The register to write | |
206 | * @value: The value to write to the register | |
207 | */ | |
208 | static inline void | |
209 | ks8695_writereg(struct ks8695_priv *ksp, int reg, u32 value) | |
210 | { | |
211 | writel(value, ksp->io_regs + reg); | |
212 | } | |
213 | ||
214 | /* Utility functions */ | |
215 | ||
216 | /** | |
217 | * ks8695_port_type - Retrieve port-type as user-friendly string | |
218 | * @ksp: The device to return the type for | |
219 | * | |
220 | * Returns a string indicating which of the WAN, LAN or HPNA | |
221 | * ports this device is likely to represent. | |
222 | */ | |
223 | static const char * | |
224 | ks8695_port_type(struct ks8695_priv *ksp) | |
225 | { | |
226 | switch (ksp->dtype) { | |
227 | case KS8695_DTYPE_LAN: | |
228 | return "LAN"; | |
229 | case KS8695_DTYPE_WAN: | |
230 | return "WAN"; | |
231 | case KS8695_DTYPE_HPNA: | |
232 | return "HPNA"; | |
233 | } | |
234 | ||
235 | return "UNKNOWN"; | |
236 | } | |
237 | ||
238 | /** | |
239 | * ks8695_update_mac - Update the MAC registers in the device | |
240 | * @ksp: The device to update | |
241 | * | |
242 | * Updates the MAC registers in the KS8695 device from the address in the | |
243 | * net_device structure associated with this interface. | |
244 | */ | |
245 | static void | |
246 | ks8695_update_mac(struct ks8695_priv *ksp) | |
247 | { | |
248 | /* Update the HW with the MAC from the net_device */ | |
249 | struct net_device *ndev = ksp->ndev; | |
250 | u32 machigh, maclow; | |
251 | ||
252 | maclow = ((ndev->dev_addr[2] << 24) | (ndev->dev_addr[3] << 16) | | |
253 | (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5] << 0)); | |
254 | machigh = ((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1] << 0)); | |
255 | ||
256 | ks8695_writereg(ksp, KS8695_MAL, maclow); | |
257 | ks8695_writereg(ksp, KS8695_MAH, machigh); | |
258 | ||
259 | } | |
260 | ||
261 | /** | |
262 | * ks8695_refill_rxbuffers - Re-fill the RX buffer ring | |
263 | * @ksp: The device to refill | |
264 | * | |
265 | * Iterates the RX ring of the device looking for empty slots. | |
266 | * For each empty slot, we allocate and map a new SKB and give it | |
267 | * to the hardware. | |
268 | * This can be called from interrupt context safely. | |
269 | */ | |
270 | static void | |
271 | ks8695_refill_rxbuffers(struct ks8695_priv *ksp) | |
272 | { | |
273 | /* Run around the RX ring, filling in any missing sk_buff's */ | |
274 | int buff_n; | |
275 | ||
276 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
277 | if (!ksp->rx_buffers[buff_n].skb) { | |
278 | struct sk_buff *skb = dev_alloc_skb(MAX_RXBUF_SIZE); | |
279 | dma_addr_t mapping; | |
280 | ||
281 | ksp->rx_buffers[buff_n].skb = skb; | |
282 | if (skb == NULL) { | |
283 | /* Failed to allocate one, perhaps | |
284 | * we'll try again later. | |
285 | */ | |
286 | break; | |
287 | } | |
288 | ||
289 | mapping = dma_map_single(ksp->dev, skb->data, | |
290 | MAX_RXBUF_SIZE, | |
291 | DMA_FROM_DEVICE); | |
292 | if (unlikely(dma_mapping_error(ksp->dev, mapping))) { | |
293 | /* Failed to DMA map this SKB, try later */ | |
294 | dev_kfree_skb_irq(skb); | |
295 | ksp->rx_buffers[buff_n].skb = NULL; | |
296 | break; | |
297 | } | |
298 | ksp->rx_buffers[buff_n].dma_ptr = mapping; | |
299 | skb->dev = ksp->ndev; | |
300 | ksp->rx_buffers[buff_n].length = MAX_RXBUF_SIZE; | |
301 | ||
302 | /* Record this into the DMA ring */ | |
303 | ksp->rx_ring[buff_n].data_ptr = cpu_to_le32(mapping); | |
304 | ksp->rx_ring[buff_n].length = | |
305 | cpu_to_le32(MAX_RXBUF_SIZE); | |
306 | ||
307 | wmb(); | |
308 | ||
309 | /* And give ownership over to the hardware */ | |
310 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); | |
311 | } | |
312 | } | |
313 | } | |
314 | ||
315 | /* Maximum number of multicast addresses which the KS8695 HW supports */ | |
316 | #define KS8695_NR_ADDRESSES 16 | |
317 | ||
318 | /** | |
319 | * ks8695_init_partial_multicast - Init the mcast addr registers | |
320 | * @ksp: The device to initialise | |
321 | * @addr: The multicast address list to use | |
322 | * @nr_addr: The number of addresses in the list | |
323 | * | |
324 | * This routine is a helper for ks8695_set_multicast - it writes | |
325 | * the additional-address registers in the KS8695 ethernet device | |
326 | * and cleans up any others left behind. | |
327 | */ | |
328 | static void | |
329 | ks8695_init_partial_multicast(struct ks8695_priv *ksp, | |
3b9a7728 | 330 | struct net_device *ndev) |
7a3c66e2 DS |
331 | { |
332 | u32 low, high; | |
333 | int i; | |
3b9a7728 | 334 | struct dev_mc_list *dmi; |
7a3c66e2 | 335 | |
3b9a7728 JP |
336 | i = 0; |
337 | netdev_for_each_mc_addr(dmi, ndev) { | |
7a3c66e2 DS |
338 | /* Ran out of space in chip? */ |
339 | BUG_ON(i == KS8695_NR_ADDRESSES); | |
340 | ||
3b9a7728 JP |
341 | low = (dmi->dmi_addr[2] << 24) | (dmi->dmi_addr[3] << 16) | |
342 | (dmi->dmi_addr[4] << 8) | (dmi->dmi_addr[5]); | |
343 | high = (dmi->dmi_addr[0] << 8) | (dmi->dmi_addr[1]); | |
7a3c66e2 DS |
344 | |
345 | ks8695_writereg(ksp, KS8695_AAL_(i), low); | |
346 | ks8695_writereg(ksp, KS8695_AAH_(i), AAH_E | high); | |
3b9a7728 | 347 | i++; |
7a3c66e2 DS |
348 | } |
349 | ||
350 | /* Clear the remaining Additional Station Addresses */ | |
351 | for (; i < KS8695_NR_ADDRESSES; i++) { | |
352 | ks8695_writereg(ksp, KS8695_AAL_(i), 0); | |
353 | ks8695_writereg(ksp, KS8695_AAH_(i), 0); | |
354 | } | |
355 | } | |
356 | ||
357 | /* Interrupt handling */ | |
358 | ||
359 | /** | |
360 | * ks8695_tx_irq - Transmit IRQ handler | |
361 | * @irq: The IRQ which went off (ignored) | |
362 | * @dev_id: The net_device for the interrupt | |
363 | * | |
364 | * Process the TX ring, clearing out any transmitted slots. | |
365 | * Allows the net_device to pass us new packets once slots are | |
366 | * freed. | |
367 | */ | |
368 | static irqreturn_t | |
369 | ks8695_tx_irq(int irq, void *dev_id) | |
370 | { | |
371 | struct net_device *ndev = (struct net_device *)dev_id; | |
372 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
373 | int buff_n; | |
374 | ||
375 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
376 | if (ksp->tx_buffers[buff_n].skb && | |
377 | !(ksp->tx_ring[buff_n].owner & cpu_to_le32(TDES_OWN))) { | |
378 | rmb(); | |
379 | /* An SKB which is not owned by HW is present */ | |
380 | /* Update the stats for the net_device */ | |
381 | ndev->stats.tx_packets++; | |
382 | ndev->stats.tx_bytes += ksp->tx_buffers[buff_n].length; | |
383 | ||
384 | /* Free the packet from the ring */ | |
385 | ksp->tx_ring[buff_n].data_ptr = 0; | |
386 | ||
387 | /* Free the sk_buff */ | |
388 | dma_unmap_single(ksp->dev, | |
389 | ksp->tx_buffers[buff_n].dma_ptr, | |
390 | ksp->tx_buffers[buff_n].length, | |
391 | DMA_TO_DEVICE); | |
392 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); | |
393 | ksp->tx_buffers[buff_n].skb = NULL; | |
394 | ksp->tx_ring_used--; | |
395 | } | |
396 | } | |
397 | ||
398 | netif_wake_queue(ndev); | |
399 | ||
400 | return IRQ_HANDLED; | |
401 | } | |
402 | ||
68d8287c F |
403 | /** |
404 | * ks8695_get_rx_enable_bit - Get rx interrupt enable/status bit | |
405 | * @ksp: Private data for the KS8695 Ethernet | |
406 | * | |
407 | * For KS8695 document: | |
408 | * Interrupt Enable Register (offset 0xE204) | |
409 | * Bit29 : WAN MAC Receive Interrupt Enable | |
410 | * Bit16 : LAN MAC Receive Interrupt Enable | |
411 | * Interrupt Status Register (Offset 0xF208) | |
412 | * Bit29: WAN MAC Receive Status | |
413 | * Bit16: LAN MAC Receive Status | |
414 | * So, this Rx interrrupt enable/status bit number is equal | |
415 | * as Rx IRQ number. | |
416 | */ | |
417 | static inline u32 ks8695_get_rx_enable_bit(struct ks8695_priv *ksp) | |
418 | { | |
419 | return ksp->rx_irq; | |
420 | } | |
421 | ||
7a3c66e2 DS |
422 | /** |
423 | * ks8695_rx_irq - Receive IRQ handler | |
424 | * @irq: The IRQ which went off (ignored) | |
425 | * @dev_id: The net_device for the interrupt | |
426 | * | |
68d8287c | 427 | * Inform NAPI that packet reception needs to be scheduled |
7a3c66e2 | 428 | */ |
31b73ab3 | 429 | |
7a3c66e2 DS |
430 | static irqreturn_t |
431 | ks8695_rx_irq(int irq, void *dev_id) | |
432 | { | |
433 | struct net_device *ndev = (struct net_device *)dev_id; | |
31b73ab3 | 434 | struct ks8695_priv *ksp = netdev_priv(ndev); |
31b73ab3 F |
435 | |
436 | spin_lock(&ksp->rx_lock); | |
437 | ||
fa6cae14 | 438 | if (napi_schedule_prep(&ksp->napi)) { |
439 | unsigned long status = readl(KS8695_IRQ_VA + KS8695_INTEN); | |
440 | unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); | |
441 | /*disable rx interrupt*/ | |
442 | status &= ~mask_bit; | |
443 | writel(status , KS8695_IRQ_VA + KS8695_INTEN); | |
444 | __napi_schedule(&ksp->napi); | |
31b73ab3 F |
445 | } |
446 | ||
447 | spin_unlock(&ksp->rx_lock); | |
448 | return IRQ_HANDLED; | |
449 | } | |
450 | ||
68d8287c F |
451 | /** |
452 | * ks8695_rx - Receive packets called by NAPI poll method | |
453 | * @ksp: Private data for the KS8695 Ethernet | |
454 | * @budget: The max packets would be receive | |
455 | */ | |
456 | ||
457 | static int ks8695_rx(struct ks8695_priv *ksp, int budget) | |
31b73ab3 | 458 | { |
68d8287c | 459 | struct net_device *ndev = ksp->ndev; |
7a3c66e2 DS |
460 | struct sk_buff *skb; |
461 | int buff_n; | |
462 | u32 flags; | |
463 | int pktlen; | |
464 | int last_rx_processed = -1; | |
31b73ab3 | 465 | int received = 0; |
7a3c66e2 DS |
466 | |
467 | buff_n = ksp->next_rx_desc_read; | |
31b73ab3 F |
468 | while (received < budget |
469 | && ksp->rx_buffers[buff_n].skb | |
470 | && (!(ksp->rx_ring[buff_n].status & | |
471 | cpu_to_le32(RDES_OWN)))) { | |
7a3c66e2 DS |
472 | rmb(); |
473 | flags = le32_to_cpu(ksp->rx_ring[buff_n].status); | |
474 | /* Found an SKB which we own, this means we | |
475 | * received a packet | |
476 | */ | |
477 | if ((flags & (RDES_FS | RDES_LS)) != | |
478 | (RDES_FS | RDES_LS)) { | |
479 | /* This packet is not the first and | |
480 | * the last segment. Therefore it is | |
481 | * a "spanning" packet and we can't | |
482 | * handle it | |
483 | */ | |
484 | goto rx_failure; | |
485 | } | |
486 | ||
487 | if (flags & (RDES_ES | RDES_RE)) { | |
488 | /* It's an error packet */ | |
489 | ndev->stats.rx_errors++; | |
490 | if (flags & RDES_TL) | |
491 | ndev->stats.rx_length_errors++; | |
492 | if (flags & RDES_RF) | |
493 | ndev->stats.rx_length_errors++; | |
494 | if (flags & RDES_CE) | |
495 | ndev->stats.rx_crc_errors++; | |
496 | if (flags & RDES_RE) | |
497 | ndev->stats.rx_missed_errors++; | |
498 | ||
499 | goto rx_failure; | |
500 | } | |
501 | ||
502 | pktlen = flags & RDES_FLEN; | |
503 | pktlen -= 4; /* Drop the CRC */ | |
504 | ||
505 | /* Retrieve the sk_buff */ | |
506 | skb = ksp->rx_buffers[buff_n].skb; | |
507 | ||
508 | /* Clear it from the ring */ | |
509 | ksp->rx_buffers[buff_n].skb = NULL; | |
510 | ksp->rx_ring[buff_n].data_ptr = 0; | |
511 | ||
512 | /* Unmap the SKB */ | |
513 | dma_unmap_single(ksp->dev, | |
514 | ksp->rx_buffers[buff_n].dma_ptr, | |
515 | ksp->rx_buffers[buff_n].length, | |
516 | DMA_FROM_DEVICE); | |
517 | ||
518 | /* Relinquish the SKB to the network layer */ | |
519 | skb_put(skb, pktlen); | |
520 | skb->protocol = eth_type_trans(skb, ndev); | |
31b73ab3 | 521 | netif_receive_skb(skb); |
7a3c66e2 DS |
522 | |
523 | /* Record stats */ | |
7a3c66e2 DS |
524 | ndev->stats.rx_packets++; |
525 | ndev->stats.rx_bytes += pktlen; | |
526 | goto rx_finished; | |
527 | ||
528 | rx_failure: | |
529 | /* This ring entry is an error, but we can | |
530 | * re-use the skb | |
531 | */ | |
532 | /* Give the ring entry back to the hardware */ | |
533 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); | |
534 | rx_finished: | |
31b73ab3 | 535 | received++; |
7a3c66e2 DS |
536 | /* And note this as processed so we can start |
537 | * from here next time | |
538 | */ | |
539 | last_rx_processed = buff_n; | |
31b73ab3 F |
540 | buff_n = (buff_n + 1) & MAX_RX_DESC_MASK; |
541 | /*And note which RX descriptor we last did */ | |
542 | if (likely(last_rx_processed != -1)) | |
543 | ksp->next_rx_desc_read = | |
544 | (last_rx_processed + 1) & | |
545 | MAX_RX_DESC_MASK; | |
31b73ab3 | 546 | } |
5c427ff9 | 547 | /* And refill the buffers */ |
548 | ks8695_refill_rxbuffers(ksp); | |
549 | ||
550 | /* Kick the RX DMA engine, in case it became | |
551 | * suspended */ | |
552 | ks8695_writereg(ksp, KS8695_DRSC, 0); | |
31b73ab3 F |
553 | return received; |
554 | } | |
7a3c66e2 | 555 | |
68d8287c F |
556 | |
557 | /** | |
558 | * ks8695_poll - Receive packet by NAPI poll method | |
559 | * @ksp: Private data for the KS8695 Ethernet | |
560 | * @budget: The remaining number packets for network subsystem | |
561 | * | |
562 | * Invoked by the network core when it requests for new | |
563 | * packets from the driver | |
564 | */ | |
31b73ab3 F |
565 | static int ks8695_poll(struct napi_struct *napi, int budget) |
566 | { | |
567 | struct ks8695_priv *ksp = container_of(napi, struct ks8695_priv, napi); | |
68d8287c | 568 | unsigned long work_done; |
31b73ab3 | 569 | |
68d8287c F |
570 | unsigned long isr = readl(KS8695_IRQ_VA + KS8695_INTEN); |
571 | unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); | |
31b73ab3 | 572 | |
68d8287c | 573 | work_done = ks8695_rx(ksp, budget); |
31b73ab3 F |
574 | |
575 | if (work_done < budget) { | |
576 | unsigned long flags; | |
577 | spin_lock_irqsave(&ksp->rx_lock, flags); | |
b96b894c | 578 | __napi_complete(napi); |
31b73ab3 F |
579 | /*enable rx interrupt*/ |
580 | writel(isr | mask_bit, KS8695_IRQ_VA + KS8695_INTEN); | |
31b73ab3 F |
581 | spin_unlock_irqrestore(&ksp->rx_lock, flags); |
582 | } | |
583 | return work_done; | |
7a3c66e2 DS |
584 | } |
585 | ||
586 | /** | |
587 | * ks8695_link_irq - Link change IRQ handler | |
588 | * @irq: The IRQ which went off (ignored) | |
589 | * @dev_id: The net_device for the interrupt | |
590 | * | |
591 | * The WAN interface can generate an IRQ when the link changes, | |
592 | * report this to the net layer and the user. | |
593 | */ | |
594 | static irqreturn_t | |
595 | ks8695_link_irq(int irq, void *dev_id) | |
596 | { | |
597 | struct net_device *ndev = (struct net_device *)dev_id; | |
598 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
599 | u32 ctrl; | |
600 | ||
601 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
602 | if (ctrl & WMC_WLS) { | |
603 | netif_carrier_on(ndev); | |
604 | if (netif_msg_link(ksp)) | |
605 | dev_info(ksp->dev, | |
606 | "%s: Link is now up (10%sMbps/%s-duplex)\n", | |
607 | ndev->name, | |
608 | (ctrl & WMC_WSS) ? "0" : "", | |
609 | (ctrl & WMC_WDS) ? "Full" : "Half"); | |
610 | } else { | |
611 | netif_carrier_off(ndev); | |
612 | if (netif_msg_link(ksp)) | |
613 | dev_info(ksp->dev, "%s: Link is now down.\n", | |
614 | ndev->name); | |
615 | } | |
616 | ||
617 | return IRQ_HANDLED; | |
618 | } | |
619 | ||
620 | ||
621 | /* KS8695 Device functions */ | |
622 | ||
623 | /** | |
624 | * ks8695_reset - Reset a KS8695 ethernet interface | |
625 | * @ksp: The interface to reset | |
626 | * | |
627 | * Perform an engine reset of the interface and re-program it | |
628 | * with sensible defaults. | |
629 | */ | |
630 | static void | |
631 | ks8695_reset(struct ks8695_priv *ksp) | |
632 | { | |
633 | int reset_timeout = watchdog; | |
634 | /* Issue the reset via the TX DMA control register */ | |
635 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TRST); | |
636 | while (reset_timeout--) { | |
637 | if (!(ks8695_readreg(ksp, KS8695_DTXC) & DTXC_TRST)) | |
638 | break; | |
639 | msleep(1); | |
640 | } | |
641 | ||
858b9ced | 642 | if (reset_timeout < 0) { |
7a3c66e2 DS |
643 | dev_crit(ksp->dev, |
644 | "Timeout waiting for DMA engines to reset\n"); | |
645 | /* And blithely carry on */ | |
646 | } | |
647 | ||
648 | /* Definitely wait long enough before attempting to program | |
649 | * the engines | |
650 | */ | |
651 | msleep(10); | |
652 | ||
653 | /* RX: unicast and broadcast */ | |
654 | ks8695_writereg(ksp, KS8695_DRXC, DRXC_RU | DRXC_RB); | |
655 | /* TX: pad and add CRC */ | |
656 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TEP | DTXC_TAC); | |
657 | } | |
658 | ||
659 | /** | |
660 | * ks8695_shutdown - Shut down a KS8695 ethernet interface | |
661 | * @ksp: The interface to shut down | |
662 | * | |
663 | * This disables packet RX/TX, cleans up IRQs, drains the rings, | |
664 | * and basically places the interface into a clean shutdown | |
665 | * state. | |
666 | */ | |
667 | static void | |
668 | ks8695_shutdown(struct ks8695_priv *ksp) | |
669 | { | |
670 | u32 ctrl; | |
671 | int buff_n; | |
672 | ||
673 | /* Disable packet transmission */ | |
674 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
675 | ks8695_writereg(ksp, KS8695_DTXC, ctrl & ~DTXC_TE); | |
676 | ||
677 | /* Disable packet reception */ | |
678 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
679 | ks8695_writereg(ksp, KS8695_DRXC, ctrl & ~DRXC_RE); | |
680 | ||
681 | /* Release the IRQs */ | |
682 | free_irq(ksp->rx_irq, ksp->ndev); | |
683 | free_irq(ksp->tx_irq, ksp->ndev); | |
684 | if (ksp->link_irq != -1) | |
685 | free_irq(ksp->link_irq, ksp->ndev); | |
686 | ||
687 | /* Throw away any pending TX packets */ | |
688 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
689 | if (ksp->tx_buffers[buff_n].skb) { | |
690 | /* Remove this SKB from the TX ring */ | |
691 | ksp->tx_ring[buff_n].owner = 0; | |
692 | ksp->tx_ring[buff_n].status = 0; | |
693 | ksp->tx_ring[buff_n].data_ptr = 0; | |
694 | ||
695 | /* Unmap and bin this SKB */ | |
696 | dma_unmap_single(ksp->dev, | |
697 | ksp->tx_buffers[buff_n].dma_ptr, | |
698 | ksp->tx_buffers[buff_n].length, | |
699 | DMA_TO_DEVICE); | |
700 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); | |
701 | ksp->tx_buffers[buff_n].skb = NULL; | |
702 | } | |
703 | } | |
704 | ||
705 | /* Purge the RX buffers */ | |
706 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
707 | if (ksp->rx_buffers[buff_n].skb) { | |
708 | /* Remove the SKB from the RX ring */ | |
709 | ksp->rx_ring[buff_n].status = 0; | |
710 | ksp->rx_ring[buff_n].data_ptr = 0; | |
711 | ||
712 | /* Unmap and bin the SKB */ | |
713 | dma_unmap_single(ksp->dev, | |
714 | ksp->rx_buffers[buff_n].dma_ptr, | |
715 | ksp->rx_buffers[buff_n].length, | |
716 | DMA_FROM_DEVICE); | |
717 | dev_kfree_skb_irq(ksp->rx_buffers[buff_n].skb); | |
718 | ksp->rx_buffers[buff_n].skb = NULL; | |
719 | } | |
720 | } | |
721 | } | |
722 | ||
723 | ||
724 | /** | |
725 | * ks8695_setup_irq - IRQ setup helper function | |
726 | * @irq: The IRQ number to claim | |
727 | * @irq_name: The name to give the IRQ claimant | |
728 | * @handler: The function to call to handle the IRQ | |
729 | * @ndev: The net_device to pass in as the dev_id argument to the handler | |
730 | * | |
731 | * Return 0 on success. | |
732 | */ | |
733 | static int | |
734 | ks8695_setup_irq(int irq, const char *irq_name, | |
735 | irq_handler_t handler, struct net_device *ndev) | |
736 | { | |
737 | int ret; | |
738 | ||
739 | ret = request_irq(irq, handler, IRQF_SHARED, irq_name, ndev); | |
740 | ||
741 | if (ret) { | |
742 | dev_err(&ndev->dev, "failure to request IRQ %d\n", irq); | |
743 | return ret; | |
744 | } | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
749 | /** | |
750 | * ks8695_init_net - Initialise a KS8695 ethernet interface | |
751 | * @ksp: The interface to initialise | |
752 | * | |
753 | * This routine fills the RX ring, initialises the DMA engines, | |
754 | * allocates the IRQs and then starts the packet TX and RX | |
755 | * engines. | |
756 | */ | |
757 | static int | |
758 | ks8695_init_net(struct ks8695_priv *ksp) | |
759 | { | |
760 | int ret; | |
761 | u32 ctrl; | |
762 | ||
763 | ks8695_refill_rxbuffers(ksp); | |
764 | ||
765 | /* Initialise the DMA engines */ | |
766 | ks8695_writereg(ksp, KS8695_RDLB, (u32) ksp->rx_ring_dma); | |
767 | ks8695_writereg(ksp, KS8695_TDLB, (u32) ksp->tx_ring_dma); | |
768 | ||
769 | /* Request the IRQs */ | |
770 | ret = ks8695_setup_irq(ksp->rx_irq, ksp->rx_irq_name, | |
771 | ks8695_rx_irq, ksp->ndev); | |
772 | if (ret) | |
773 | return ret; | |
774 | ret = ks8695_setup_irq(ksp->tx_irq, ksp->tx_irq_name, | |
775 | ks8695_tx_irq, ksp->ndev); | |
776 | if (ret) | |
777 | return ret; | |
778 | if (ksp->link_irq != -1) { | |
779 | ret = ks8695_setup_irq(ksp->link_irq, ksp->link_irq_name, | |
780 | ks8695_link_irq, ksp->ndev); | |
781 | if (ret) | |
782 | return ret; | |
783 | } | |
784 | ||
785 | /* Set up the ring indices */ | |
786 | ksp->next_rx_desc_read = 0; | |
787 | ksp->tx_ring_next_slot = 0; | |
788 | ksp->tx_ring_used = 0; | |
789 | ||
790 | /* Bring up transmission */ | |
791 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
792 | /* Enable packet transmission */ | |
793 | ks8695_writereg(ksp, KS8695_DTXC, ctrl | DTXC_TE); | |
794 | ||
795 | /* Bring up the reception */ | |
796 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
797 | /* Enable packet reception */ | |
798 | ks8695_writereg(ksp, KS8695_DRXC, ctrl | DRXC_RE); | |
799 | /* And start the DMA engine */ | |
800 | ks8695_writereg(ksp, KS8695_DRSC, 0); | |
801 | ||
802 | /* All done */ | |
803 | return 0; | |
804 | } | |
805 | ||
806 | /** | |
807 | * ks8695_release_device - HW resource release for KS8695 e-net | |
808 | * @ksp: The device to be freed | |
809 | * | |
810 | * This unallocates io memory regions, dma-coherent regions etc | |
811 | * which were allocated in ks8695_probe. | |
812 | */ | |
813 | static void | |
814 | ks8695_release_device(struct ks8695_priv *ksp) | |
815 | { | |
816 | /* Unmap the registers */ | |
817 | iounmap(ksp->io_regs); | |
818 | if (ksp->phyiface_regs) | |
819 | iounmap(ksp->phyiface_regs); | |
820 | ||
821 | /* And release the request */ | |
822 | release_resource(ksp->regs_req); | |
823 | kfree(ksp->regs_req); | |
824 | if (ksp->phyiface_req) { | |
825 | release_resource(ksp->phyiface_req); | |
826 | kfree(ksp->phyiface_req); | |
827 | } | |
828 | ||
829 | /* Free the ring buffers */ | |
830 | dma_free_coherent(ksp->dev, RING_DMA_SIZE, | |
831 | ksp->ring_base, ksp->ring_base_dma); | |
832 | } | |
833 | ||
834 | /* Ethtool support */ | |
835 | ||
836 | /** | |
837 | * ks8695_get_msglevel - Get the messages enabled for emission | |
838 | * @ndev: The network device to read from | |
839 | */ | |
840 | static u32 | |
841 | ks8695_get_msglevel(struct net_device *ndev) | |
842 | { | |
843 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
844 | ||
845 | return ksp->msg_enable; | |
846 | } | |
847 | ||
848 | /** | |
849 | * ks8695_set_msglevel - Set the messages enabled for emission | |
850 | * @ndev: The network device to configure | |
851 | * @value: The messages to set for emission | |
852 | */ | |
853 | static void | |
854 | ks8695_set_msglevel(struct net_device *ndev, u32 value) | |
855 | { | |
856 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
857 | ||
858 | ksp->msg_enable = value; | |
859 | } | |
860 | ||
861 | /** | |
862 | * ks8695_get_settings - Get device-specific settings. | |
863 | * @ndev: The network device to read settings from | |
864 | * @cmd: The ethtool structure to read into | |
865 | */ | |
866 | static int | |
867 | ks8695_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd) | |
868 | { | |
869 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
870 | u32 ctrl; | |
871 | ||
872 | /* All ports on the KS8695 support these... */ | |
873 | cmd->supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | | |
874 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | | |
875 | SUPPORTED_TP | SUPPORTED_MII); | |
876 | cmd->transceiver = XCVR_INTERNAL; | |
877 | ||
878 | /* Port specific extras */ | |
879 | switch (ksp->dtype) { | |
880 | case KS8695_DTYPE_HPNA: | |
881 | cmd->phy_address = 0; | |
882 | /* not supported for HPNA */ | |
883 | cmd->autoneg = AUTONEG_DISABLE; | |
884 | ||
885 | /* BUG: Erm, dtype hpna implies no phy regs */ | |
886 | /* | |
887 | ctrl = readl(KS8695_MISC_VA + KS8695_HMC); | |
888 | cmd->speed = (ctrl & HMC_HSS) ? SPEED_100 : SPEED_10; | |
889 | cmd->duplex = (ctrl & HMC_HDS) ? DUPLEX_FULL : DUPLEX_HALF; | |
890 | */ | |
891 | return -EOPNOTSUPP; | |
892 | case KS8695_DTYPE_WAN: | |
893 | cmd->advertising = ADVERTISED_TP | ADVERTISED_MII; | |
894 | cmd->port = PORT_MII; | |
895 | cmd->supported |= (SUPPORTED_Autoneg | SUPPORTED_Pause); | |
896 | cmd->phy_address = 0; | |
897 | ||
898 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
899 | if ((ctrl & WMC_WAND) == 0) { | |
900 | /* auto-negotiation is enabled */ | |
901 | cmd->advertising |= ADVERTISED_Autoneg; | |
902 | if (ctrl & WMC_WANA100F) | |
903 | cmd->advertising |= ADVERTISED_100baseT_Full; | |
904 | if (ctrl & WMC_WANA100H) | |
905 | cmd->advertising |= ADVERTISED_100baseT_Half; | |
906 | if (ctrl & WMC_WANA10F) | |
907 | cmd->advertising |= ADVERTISED_10baseT_Full; | |
908 | if (ctrl & WMC_WANA10H) | |
909 | cmd->advertising |= ADVERTISED_10baseT_Half; | |
910 | if (ctrl & WMC_WANAP) | |
911 | cmd->advertising |= ADVERTISED_Pause; | |
912 | cmd->autoneg = AUTONEG_ENABLE; | |
913 | ||
914 | cmd->speed = (ctrl & WMC_WSS) ? SPEED_100 : SPEED_10; | |
915 | cmd->duplex = (ctrl & WMC_WDS) ? | |
916 | DUPLEX_FULL : DUPLEX_HALF; | |
917 | } else { | |
918 | /* auto-negotiation is disabled */ | |
919 | cmd->autoneg = AUTONEG_DISABLE; | |
920 | ||
921 | cmd->speed = (ctrl & WMC_WANF100) ? | |
922 | SPEED_100 : SPEED_10; | |
923 | cmd->duplex = (ctrl & WMC_WANFF) ? | |
924 | DUPLEX_FULL : DUPLEX_HALF; | |
925 | } | |
926 | break; | |
927 | case KS8695_DTYPE_LAN: | |
928 | return -EOPNOTSUPP; | |
929 | } | |
930 | ||
931 | return 0; | |
932 | } | |
933 | ||
934 | /** | |
935 | * ks8695_set_settings - Set device-specific settings. | |
936 | * @ndev: The network device to configure | |
937 | * @cmd: The settings to configure | |
938 | */ | |
939 | static int | |
940 | ks8695_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd) | |
941 | { | |
942 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
943 | u32 ctrl; | |
944 | ||
945 | if ((cmd->speed != SPEED_10) && (cmd->speed != SPEED_100)) | |
946 | return -EINVAL; | |
947 | if ((cmd->duplex != DUPLEX_HALF) && (cmd->duplex != DUPLEX_FULL)) | |
948 | return -EINVAL; | |
949 | if (cmd->port != PORT_MII) | |
950 | return -EINVAL; | |
951 | if (cmd->transceiver != XCVR_INTERNAL) | |
952 | return -EINVAL; | |
953 | if ((cmd->autoneg != AUTONEG_DISABLE) && | |
954 | (cmd->autoneg != AUTONEG_ENABLE)) | |
955 | return -EINVAL; | |
956 | ||
957 | if (cmd->autoneg == AUTONEG_ENABLE) { | |
958 | if ((cmd->advertising & (ADVERTISED_10baseT_Half | | |
959 | ADVERTISED_10baseT_Full | | |
960 | ADVERTISED_100baseT_Half | | |
961 | ADVERTISED_100baseT_Full)) == 0) | |
962 | return -EINVAL; | |
963 | ||
964 | switch (ksp->dtype) { | |
965 | case KS8695_DTYPE_HPNA: | |
966 | /* HPNA does not support auto-negotiation. */ | |
967 | return -EINVAL; | |
968 | case KS8695_DTYPE_WAN: | |
969 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
970 | ||
971 | ctrl &= ~(WMC_WAND | WMC_WANA100F | WMC_WANA100H | | |
972 | WMC_WANA10F | WMC_WANA10H); | |
973 | if (cmd->advertising & ADVERTISED_100baseT_Full) | |
974 | ctrl |= WMC_WANA100F; | |
975 | if (cmd->advertising & ADVERTISED_100baseT_Half) | |
976 | ctrl |= WMC_WANA100H; | |
977 | if (cmd->advertising & ADVERTISED_10baseT_Full) | |
978 | ctrl |= WMC_WANA10F; | |
979 | if (cmd->advertising & ADVERTISED_10baseT_Half) | |
980 | ctrl |= WMC_WANA10H; | |
981 | ||
982 | /* force a re-negotiation */ | |
983 | ctrl |= WMC_WANR; | |
984 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
985 | break; | |
986 | case KS8695_DTYPE_LAN: | |
987 | return -EOPNOTSUPP; | |
988 | } | |
989 | ||
990 | } else { | |
991 | switch (ksp->dtype) { | |
992 | case KS8695_DTYPE_HPNA: | |
993 | /* BUG: dtype_hpna implies no phy registers */ | |
994 | /* | |
995 | ctrl = __raw_readl(KS8695_MISC_VA + KS8695_HMC); | |
996 | ||
997 | ctrl &= ~(HMC_HSS | HMC_HDS); | |
998 | if (cmd->speed == SPEED_100) | |
999 | ctrl |= HMC_HSS; | |
1000 | if (cmd->duplex == DUPLEX_FULL) | |
1001 | ctrl |= HMC_HDS; | |
1002 | ||
1003 | __raw_writel(ctrl, KS8695_MISC_VA + KS8695_HMC); | |
1004 | */ | |
1005 | return -EOPNOTSUPP; | |
1006 | case KS8695_DTYPE_WAN: | |
1007 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1008 | ||
1009 | /* disable auto-negotiation */ | |
1010 | ctrl |= WMC_WAND; | |
1011 | ctrl &= ~(WMC_WANF100 | WMC_WANFF); | |
1012 | ||
1013 | if (cmd->speed == SPEED_100) | |
1014 | ctrl |= WMC_WANF100; | |
1015 | if (cmd->duplex == DUPLEX_FULL) | |
1016 | ctrl |= WMC_WANFF; | |
1017 | ||
1018 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
1019 | break; | |
1020 | case KS8695_DTYPE_LAN: | |
1021 | return -EOPNOTSUPP; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | /** | |
1029 | * ks8695_nwayreset - Restart the autonegotiation on the port. | |
1030 | * @ndev: The network device to restart autoneotiation on | |
1031 | */ | |
1032 | static int | |
1033 | ks8695_nwayreset(struct net_device *ndev) | |
1034 | { | |
1035 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1036 | u32 ctrl; | |
1037 | ||
1038 | switch (ksp->dtype) { | |
1039 | case KS8695_DTYPE_HPNA: | |
1040 | /* No phy means no autonegotiation on hpna */ | |
1041 | return -EINVAL; | |
1042 | case KS8695_DTYPE_WAN: | |
1043 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1044 | ||
1045 | if ((ctrl & WMC_WAND) == 0) | |
1046 | writel(ctrl | WMC_WANR, | |
1047 | ksp->phyiface_regs + KS8695_WMC); | |
1048 | else | |
1049 | /* auto-negotiation not enabled */ | |
1050 | return -EINVAL; | |
1051 | break; | |
1052 | case KS8695_DTYPE_LAN: | |
1053 | return -EOPNOTSUPP; | |
1054 | } | |
1055 | ||
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | /** | |
1060 | * ks8695_get_link - Retrieve link status of network interface | |
1061 | * @ndev: The network interface to retrive the link status of. | |
1062 | */ | |
1063 | static u32 | |
1064 | ks8695_get_link(struct net_device *ndev) | |
1065 | { | |
1066 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1067 | u32 ctrl; | |
1068 | ||
1069 | switch (ksp->dtype) { | |
1070 | case KS8695_DTYPE_HPNA: | |
1071 | /* HPNA always has link */ | |
1072 | return 1; | |
1073 | case KS8695_DTYPE_WAN: | |
1074 | /* WAN we can read the PHY for */ | |
1075 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1076 | return ctrl & WMC_WLS; | |
1077 | case KS8695_DTYPE_LAN: | |
1078 | return -EOPNOTSUPP; | |
1079 | } | |
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * ks8695_get_pause - Retrieve network pause/flow-control advertising | |
1085 | * @ndev: The device to retrieve settings from | |
1086 | * @param: The structure to fill out with the information | |
1087 | */ | |
1088 | static void | |
1089 | ks8695_get_pause(struct net_device *ndev, struct ethtool_pauseparam *param) | |
1090 | { | |
1091 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1092 | u32 ctrl; | |
1093 | ||
1094 | switch (ksp->dtype) { | |
1095 | case KS8695_DTYPE_HPNA: | |
1096 | /* No phy link on hpna to configure */ | |
1097 | return; | |
1098 | case KS8695_DTYPE_WAN: | |
1099 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1100 | ||
1101 | /* advertise Pause */ | |
1102 | param->autoneg = (ctrl & WMC_WANAP); | |
1103 | ||
1104 | /* current Rx Flow-control */ | |
1105 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
1106 | param->rx_pause = (ctrl & DRXC_RFCE); | |
1107 | ||
1108 | /* current Tx Flow-control */ | |
1109 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
1110 | param->tx_pause = (ctrl & DTXC_TFCE); | |
1111 | break; | |
1112 | case KS8695_DTYPE_LAN: | |
1113 | /* The LAN's "phy" is a direct-attached switch */ | |
1114 | return; | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /** | |
1119 | * ks8695_set_pause - Configure pause/flow-control | |
1120 | * @ndev: The device to configure | |
1121 | * @param: The pause parameters to set | |
1122 | * | |
1123 | * TODO: Implement this | |
1124 | */ | |
1125 | static int | |
1126 | ks8695_set_pause(struct net_device *ndev, struct ethtool_pauseparam *param) | |
1127 | { | |
1128 | return -EOPNOTSUPP; | |
1129 | } | |
1130 | ||
1131 | /** | |
1132 | * ks8695_get_drvinfo - Retrieve driver information | |
1133 | * @ndev: The network device to retrieve info about | |
1134 | * @info: The info structure to fill out. | |
1135 | */ | |
1136 | static void | |
1137 | ks8695_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info) | |
1138 | { | |
1139 | strlcpy(info->driver, MODULENAME, sizeof(info->driver)); | |
1140 | strlcpy(info->version, MODULEVERSION, sizeof(info->version)); | |
c2313557 | 1141 | strlcpy(info->bus_info, dev_name(ndev->dev.parent), |
7a3c66e2 DS |
1142 | sizeof(info->bus_info)); |
1143 | } | |
1144 | ||
0fc0b732 | 1145 | static const struct ethtool_ops ks8695_ethtool_ops = { |
7a3c66e2 DS |
1146 | .get_msglevel = ks8695_get_msglevel, |
1147 | .set_msglevel = ks8695_set_msglevel, | |
1148 | .get_settings = ks8695_get_settings, | |
1149 | .set_settings = ks8695_set_settings, | |
1150 | .nway_reset = ks8695_nwayreset, | |
1151 | .get_link = ks8695_get_link, | |
1152 | .get_pauseparam = ks8695_get_pause, | |
1153 | .set_pauseparam = ks8695_set_pause, | |
1154 | .get_drvinfo = ks8695_get_drvinfo, | |
1155 | }; | |
1156 | ||
1157 | /* Network device interface functions */ | |
1158 | ||
1159 | /** | |
1160 | * ks8695_set_mac - Update MAC in net dev and HW | |
1161 | * @ndev: The network device to update | |
1162 | * @addr: The new MAC address to set | |
1163 | */ | |
1164 | static int | |
1165 | ks8695_set_mac(struct net_device *ndev, void *addr) | |
1166 | { | |
1167 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1168 | struct sockaddr *address = addr; | |
1169 | ||
1170 | if (!is_valid_ether_addr(address->sa_data)) | |
1171 | return -EADDRNOTAVAIL; | |
1172 | ||
1173 | memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len); | |
1174 | ||
1175 | ks8695_update_mac(ksp); | |
1176 | ||
1177 | dev_dbg(ksp->dev, "%s: Updated MAC address to %pM\n", | |
1178 | ndev->name, ndev->dev_addr); | |
1179 | ||
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | /** | |
1184 | * ks8695_set_multicast - Set up the multicast behaviour of the interface | |
1185 | * @ndev: The net_device to configure | |
1186 | * | |
1187 | * This routine, called by the net layer, configures promiscuity | |
1188 | * and multicast reception behaviour for the interface. | |
1189 | */ | |
1190 | static void | |
1191 | ks8695_set_multicast(struct net_device *ndev) | |
1192 | { | |
1193 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1194 | u32 ctrl; | |
1195 | ||
1196 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
1197 | ||
1198 | if (ndev->flags & IFF_PROMISC) { | |
1199 | /* enable promiscuous mode */ | |
1200 | ctrl |= DRXC_RA; | |
1201 | } else if (ndev->flags & ~IFF_PROMISC) { | |
1202 | /* disable promiscuous mode */ | |
1203 | ctrl &= ~DRXC_RA; | |
1204 | } | |
1205 | ||
1206 | if (ndev->flags & IFF_ALLMULTI) { | |
1207 | /* enable all multicast mode */ | |
1208 | ctrl |= DRXC_RM; | |
4cd24eaf | 1209 | } else if (netdev_mc_count(ndev) > KS8695_NR_ADDRESSES) { |
7a3c66e2 DS |
1210 | /* more specific multicast addresses than can be |
1211 | * handled in hardware | |
1212 | */ | |
1213 | ctrl |= DRXC_RM; | |
1214 | } else { | |
1215 | /* enable specific multicasts */ | |
1216 | ctrl &= ~DRXC_RM; | |
3b9a7728 | 1217 | ks8695_init_partial_multicast(ksp, ndev); |
7a3c66e2 DS |
1218 | } |
1219 | ||
1220 | ks8695_writereg(ksp, KS8695_DRXC, ctrl); | |
1221 | } | |
1222 | ||
1223 | /** | |
1224 | * ks8695_timeout - Handle a network tx/rx timeout. | |
1225 | * @ndev: The net_device which timed out. | |
1226 | * | |
1227 | * A network transaction timed out, reset the device. | |
1228 | */ | |
1229 | static void | |
1230 | ks8695_timeout(struct net_device *ndev) | |
1231 | { | |
1232 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1233 | ||
1234 | netif_stop_queue(ndev); | |
1235 | ks8695_shutdown(ksp); | |
1236 | ||
1237 | ks8695_reset(ksp); | |
1238 | ||
1239 | ks8695_update_mac(ksp); | |
1240 | ||
1241 | /* We ignore the return from this since it managed to init | |
1242 | * before it probably will be okay to init again. | |
1243 | */ | |
1244 | ks8695_init_net(ksp); | |
1245 | ||
1246 | /* Reconfigure promiscuity etc */ | |
1247 | ks8695_set_multicast(ndev); | |
1248 | ||
1249 | /* And start the TX queue once more */ | |
1250 | netif_start_queue(ndev); | |
1251 | } | |
1252 | ||
1253 | /** | |
1254 | * ks8695_start_xmit - Start a packet transmission | |
1255 | * @skb: The packet to transmit | |
1256 | * @ndev: The network device to send the packet on | |
1257 | * | |
1258 | * This routine, called by the net layer, takes ownership of the | |
1259 | * sk_buff and adds it to the TX ring. It then kicks the TX DMA | |
1260 | * engine to ensure transmission begins. | |
1261 | */ | |
1262 | static int | |
1263 | ks8695_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1264 | { | |
1265 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1266 | int buff_n; | |
1267 | dma_addr_t dmap; | |
1268 | ||
1269 | spin_lock_irq(&ksp->txq_lock); | |
1270 | ||
1271 | if (ksp->tx_ring_used == MAX_TX_DESC) { | |
1272 | /* Somehow we got entered when we have no room */ | |
1273 | spin_unlock_irq(&ksp->txq_lock); | |
1274 | return NETDEV_TX_BUSY; | |
1275 | } | |
1276 | ||
1277 | buff_n = ksp->tx_ring_next_slot; | |
1278 | ||
1279 | BUG_ON(ksp->tx_buffers[buff_n].skb); | |
1280 | ||
1281 | dmap = dma_map_single(ksp->dev, skb->data, skb->len, DMA_TO_DEVICE); | |
1282 | if (unlikely(dma_mapping_error(ksp->dev, dmap))) { | |
1283 | /* Failed to DMA map this SKB, give it back for now */ | |
1284 | spin_unlock_irq(&ksp->txq_lock); | |
1285 | dev_dbg(ksp->dev, "%s: Could not map DMA memory for "\ | |
1286 | "transmission, trying later\n", ndev->name); | |
1287 | return NETDEV_TX_BUSY; | |
1288 | } | |
1289 | ||
1290 | ksp->tx_buffers[buff_n].dma_ptr = dmap; | |
1291 | /* Mapped okay, store the buffer pointer and length for later */ | |
1292 | ksp->tx_buffers[buff_n].skb = skb; | |
1293 | ksp->tx_buffers[buff_n].length = skb->len; | |
1294 | ||
1295 | /* Fill out the TX descriptor */ | |
1296 | ksp->tx_ring[buff_n].data_ptr = | |
1297 | cpu_to_le32(ksp->tx_buffers[buff_n].dma_ptr); | |
1298 | ksp->tx_ring[buff_n].status = | |
1299 | cpu_to_le32(TDES_IC | TDES_FS | TDES_LS | | |
1300 | (skb->len & TDES_TBS)); | |
1301 | ||
1302 | wmb(); | |
1303 | ||
1304 | /* Hand it over to the hardware */ | |
1305 | ksp->tx_ring[buff_n].owner = cpu_to_le32(TDES_OWN); | |
1306 | ||
1307 | if (++ksp->tx_ring_used == MAX_TX_DESC) | |
1308 | netif_stop_queue(ndev); | |
1309 | ||
1310 | ndev->trans_start = jiffies; | |
1311 | ||
1312 | /* Kick the TX DMA in case it decided to go IDLE */ | |
1313 | ks8695_writereg(ksp, KS8695_DTSC, 0); | |
1314 | ||
1315 | /* And update the next ring slot */ | |
1316 | ksp->tx_ring_next_slot = (buff_n + 1) & MAX_TX_DESC_MASK; | |
1317 | ||
1318 | spin_unlock_irq(&ksp->txq_lock); | |
1319 | return NETDEV_TX_OK; | |
1320 | } | |
1321 | ||
1322 | /** | |
1323 | * ks8695_stop - Stop (shutdown) a KS8695 ethernet interface | |
1324 | * @ndev: The net_device to stop | |
1325 | * | |
1326 | * This disables the TX queue and cleans up a KS8695 ethernet | |
1327 | * device. | |
1328 | */ | |
1329 | static int | |
1330 | ks8695_stop(struct net_device *ndev) | |
1331 | { | |
1332 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1333 | ||
1334 | netif_stop_queue(ndev); | |
68d8287c | 1335 | napi_disable(&ksp->napi); |
7a3c66e2 DS |
1336 | |
1337 | ks8695_shutdown(ksp); | |
1338 | ||
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | /** | |
1343 | * ks8695_open - Open (bring up) a KS8695 ethernet interface | |
1344 | * @ndev: The net_device to open | |
1345 | * | |
1346 | * This resets, configures the MAC, initialises the RX ring and | |
1347 | * DMA engines and starts the TX queue for a KS8695 ethernet | |
1348 | * device. | |
1349 | */ | |
1350 | static int | |
1351 | ks8695_open(struct net_device *ndev) | |
1352 | { | |
1353 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1354 | int ret; | |
1355 | ||
1356 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1357 | return -EADDRNOTAVAIL; | |
1358 | ||
1359 | ks8695_reset(ksp); | |
1360 | ||
1361 | ks8695_update_mac(ksp); | |
1362 | ||
1363 | ret = ks8695_init_net(ksp); | |
1364 | if (ret) { | |
1365 | ks8695_shutdown(ksp); | |
1366 | return ret; | |
1367 | } | |
1368 | ||
68d8287c | 1369 | napi_enable(&ksp->napi); |
7a3c66e2 DS |
1370 | netif_start_queue(ndev); |
1371 | ||
1372 | return 0; | |
1373 | } | |
1374 | ||
1375 | /* Platform device driver */ | |
1376 | ||
1377 | /** | |
1378 | * ks8695_init_switch - Init LAN switch to known good defaults. | |
1379 | * @ksp: The device to initialise | |
1380 | * | |
1381 | * This initialises the LAN switch in the KS8695 to a known-good | |
1382 | * set of defaults. | |
1383 | */ | |
1384 | static void __devinit | |
1385 | ks8695_init_switch(struct ks8695_priv *ksp) | |
1386 | { | |
1387 | u32 ctrl; | |
1388 | ||
1389 | /* Default value for SEC0 according to datasheet */ | |
1390 | ctrl = 0x40819e00; | |
1391 | ||
1392 | /* LED0 = Speed LED1 = Link/Activity */ | |
1393 | ctrl &= ~(SEC0_LLED1S | SEC0_LLED0S); | |
1394 | ctrl |= (LLED0S_LINK | LLED1S_LINK_ACTIVITY); | |
1395 | ||
1396 | /* Enable Switch */ | |
1397 | ctrl |= SEC0_ENABLE; | |
1398 | ||
1399 | writel(ctrl, ksp->phyiface_regs + KS8695_SEC0); | |
1400 | ||
1401 | /* Defaults for SEC1 */ | |
1402 | writel(0x9400100, ksp->phyiface_regs + KS8695_SEC1); | |
1403 | } | |
1404 | ||
1405 | /** | |
1406 | * ks8695_init_wan_phy - Initialise the WAN PHY to sensible defaults | |
1407 | * @ksp: The device to initialise | |
1408 | * | |
1409 | * This initialises a KS8695's WAN phy to sensible values for | |
1410 | * autonegotiation etc. | |
1411 | */ | |
1412 | static void __devinit | |
1413 | ks8695_init_wan_phy(struct ks8695_priv *ksp) | |
1414 | { | |
1415 | u32 ctrl; | |
1416 | ||
1417 | /* Support auto-negotiation */ | |
1418 | ctrl = (WMC_WANAP | WMC_WANA100F | WMC_WANA100H | | |
1419 | WMC_WANA10F | WMC_WANA10H); | |
1420 | ||
1421 | /* LED0 = Activity , LED1 = Link */ | |
1422 | ctrl |= (WLED0S_ACTIVITY | WLED1S_LINK); | |
1423 | ||
1424 | /* Restart Auto-negotiation */ | |
1425 | ctrl |= WMC_WANR; | |
1426 | ||
1427 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
1428 | ||
1429 | writel(0, ksp->phyiface_regs + KS8695_WPPM); | |
1430 | writel(0, ksp->phyiface_regs + KS8695_PPS); | |
1431 | } | |
1432 | ||
1433 | static const struct net_device_ops ks8695_netdev_ops = { | |
1434 | .ndo_open = ks8695_open, | |
1435 | .ndo_stop = ks8695_stop, | |
1436 | .ndo_start_xmit = ks8695_start_xmit, | |
1437 | .ndo_tx_timeout = ks8695_timeout, | |
1438 | .ndo_set_mac_address = ks8695_set_mac, | |
52255bbe | 1439 | .ndo_validate_addr = eth_validate_addr, |
7a3c66e2 DS |
1440 | .ndo_set_multicast_list = ks8695_set_multicast, |
1441 | }; | |
1442 | ||
1443 | /** | |
1444 | * ks8695_probe - Probe and initialise a KS8695 ethernet interface | |
1445 | * @pdev: The platform device to probe | |
1446 | * | |
1447 | * Initialise a KS8695 ethernet device from platform data. | |
1448 | * | |
1449 | * This driver requires at least one IORESOURCE_MEM for the | |
1450 | * registers and two IORESOURCE_IRQ for the RX and TX IRQs | |
1451 | * respectively. It can optionally take an additional | |
1452 | * IORESOURCE_MEM for the switch or phy in the case of the lan or | |
1453 | * wan ports, and an IORESOURCE_IRQ for the link IRQ for the wan | |
1454 | * port. | |
1455 | */ | |
1456 | static int __devinit | |
1457 | ks8695_probe(struct platform_device *pdev) | |
1458 | { | |
1459 | struct ks8695_priv *ksp; | |
1460 | struct net_device *ndev; | |
1461 | struct resource *regs_res, *phyiface_res; | |
1462 | struct resource *rxirq_res, *txirq_res, *linkirq_res; | |
1463 | int ret = 0; | |
1464 | int buff_n; | |
1465 | u32 machigh, maclow; | |
1466 | ||
1467 | /* Initialise a net_device */ | |
1468 | ndev = alloc_etherdev(sizeof(struct ks8695_priv)); | |
1469 | if (!ndev) { | |
1470 | dev_err(&pdev->dev, "could not allocate device.\n"); | |
1471 | return -ENOMEM; | |
1472 | } | |
1473 | ||
1474 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1475 | ||
1476 | dev_dbg(&pdev->dev, "ks8695_probe() called\n"); | |
1477 | ||
1478 | /* Configure our private structure a little */ | |
1479 | ksp = netdev_priv(ndev); | |
1480 | memset(ksp, 0, sizeof(struct ks8695_priv)); | |
1481 | ||
1482 | ksp->dev = &pdev->dev; | |
1483 | ksp->ndev = ndev; | |
1484 | ksp->msg_enable = NETIF_MSG_LINK; | |
1485 | ||
1486 | /* Retrieve resources */ | |
1487 | regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1488 | phyiface_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
1489 | ||
1490 | rxirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1491 | txirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); | |
1492 | linkirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); | |
1493 | ||
1494 | if (!(regs_res && rxirq_res && txirq_res)) { | |
1495 | dev_err(ksp->dev, "insufficient resources\n"); | |
1496 | ret = -ENOENT; | |
1497 | goto failure; | |
1498 | } | |
1499 | ||
1500 | ksp->regs_req = request_mem_region(regs_res->start, | |
1501 | resource_size(regs_res), | |
1502 | pdev->name); | |
1503 | ||
1504 | if (!ksp->regs_req) { | |
1505 | dev_err(ksp->dev, "cannot claim register space\n"); | |
1506 | ret = -EIO; | |
1507 | goto failure; | |
1508 | } | |
1509 | ||
1510 | ksp->io_regs = ioremap(regs_res->start, resource_size(regs_res)); | |
1511 | ||
1512 | if (!ksp->io_regs) { | |
1513 | dev_err(ksp->dev, "failed to ioremap registers\n"); | |
1514 | ret = -EINVAL; | |
1515 | goto failure; | |
1516 | } | |
1517 | ||
1518 | if (phyiface_res) { | |
1519 | ksp->phyiface_req = | |
1520 | request_mem_region(phyiface_res->start, | |
1521 | resource_size(phyiface_res), | |
1522 | phyiface_res->name); | |
1523 | ||
1524 | if (!ksp->phyiface_req) { | |
1525 | dev_err(ksp->dev, | |
1526 | "cannot claim switch register space\n"); | |
1527 | ret = -EIO; | |
1528 | goto failure; | |
1529 | } | |
1530 | ||
1531 | ksp->phyiface_regs = ioremap(phyiface_res->start, | |
1532 | resource_size(phyiface_res)); | |
1533 | ||
1534 | if (!ksp->phyiface_regs) { | |
1535 | dev_err(ksp->dev, | |
1536 | "failed to ioremap switch registers\n"); | |
1537 | ret = -EINVAL; | |
1538 | goto failure; | |
1539 | } | |
1540 | } | |
1541 | ||
1542 | ksp->rx_irq = rxirq_res->start; | |
1543 | ksp->rx_irq_name = rxirq_res->name ? rxirq_res->name : "Ethernet RX"; | |
1544 | ksp->tx_irq = txirq_res->start; | |
1545 | ksp->tx_irq_name = txirq_res->name ? txirq_res->name : "Ethernet TX"; | |
1546 | ksp->link_irq = (linkirq_res ? linkirq_res->start : -1); | |
1547 | ksp->link_irq_name = (linkirq_res && linkirq_res->name) ? | |
1548 | linkirq_res->name : "Ethernet Link"; | |
1549 | ||
1550 | /* driver system setup */ | |
1551 | ndev->netdev_ops = &ks8695_netdev_ops; | |
1552 | SET_ETHTOOL_OPS(ndev, &ks8695_ethtool_ops); | |
1553 | ndev->watchdog_timeo = msecs_to_jiffies(watchdog); | |
1554 | ||
68d8287c | 1555 | netif_napi_add(ndev, &ksp->napi, ks8695_poll, NAPI_WEIGHT); |
31b73ab3 | 1556 | |
7a3c66e2 DS |
1557 | /* Retrieve the default MAC addr from the chip. */ |
1558 | /* The bootloader should have left it in there for us. */ | |
1559 | ||
1560 | machigh = ks8695_readreg(ksp, KS8695_MAH); | |
1561 | maclow = ks8695_readreg(ksp, KS8695_MAL); | |
1562 | ||
1563 | ndev->dev_addr[0] = (machigh >> 8) & 0xFF; | |
1564 | ndev->dev_addr[1] = machigh & 0xFF; | |
1565 | ndev->dev_addr[2] = (maclow >> 24) & 0xFF; | |
1566 | ndev->dev_addr[3] = (maclow >> 16) & 0xFF; | |
1567 | ndev->dev_addr[4] = (maclow >> 8) & 0xFF; | |
1568 | ndev->dev_addr[5] = maclow & 0xFF; | |
1569 | ||
1570 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1571 | dev_warn(ksp->dev, "%s: Invalid ethernet MAC address. Please " | |
1572 | "set using ifconfig\n", ndev->name); | |
1573 | ||
1574 | /* In order to be efficient memory-wise, we allocate both | |
1575 | * rings in one go. | |
1576 | */ | |
1577 | ksp->ring_base = dma_alloc_coherent(&pdev->dev, RING_DMA_SIZE, | |
1578 | &ksp->ring_base_dma, GFP_KERNEL); | |
1579 | if (!ksp->ring_base) { | |
1580 | ret = -ENOMEM; | |
1581 | goto failure; | |
1582 | } | |
1583 | ||
1584 | /* Specify the TX DMA ring buffer */ | |
1585 | ksp->tx_ring = ksp->ring_base; | |
1586 | ksp->tx_ring_dma = ksp->ring_base_dma; | |
1587 | ||
1588 | /* And initialise the queue's lock */ | |
1589 | spin_lock_init(&ksp->txq_lock); | |
31b73ab3 | 1590 | spin_lock_init(&ksp->rx_lock); |
7a3c66e2 DS |
1591 | |
1592 | /* Specify the RX DMA ring buffer */ | |
1593 | ksp->rx_ring = ksp->ring_base + TX_RING_DMA_SIZE; | |
1594 | ksp->rx_ring_dma = ksp->ring_base_dma + TX_RING_DMA_SIZE; | |
1595 | ||
1596 | /* Zero the descriptor rings */ | |
1597 | memset(ksp->tx_ring, 0, TX_RING_DMA_SIZE); | |
1598 | memset(ksp->rx_ring, 0, RX_RING_DMA_SIZE); | |
1599 | ||
1600 | /* Build the rings */ | |
1601 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
1602 | ksp->tx_ring[buff_n].next_desc = | |
1603 | cpu_to_le32(ksp->tx_ring_dma + | |
1604 | (sizeof(struct tx_ring_desc) * | |
1605 | ((buff_n + 1) & MAX_TX_DESC_MASK))); | |
1606 | } | |
1607 | ||
1608 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
1609 | ksp->rx_ring[buff_n].next_desc = | |
1610 | cpu_to_le32(ksp->rx_ring_dma + | |
1611 | (sizeof(struct rx_ring_desc) * | |
1612 | ((buff_n + 1) & MAX_RX_DESC_MASK))); | |
1613 | } | |
1614 | ||
1615 | /* Initialise the port (physically) */ | |
1616 | if (ksp->phyiface_regs && ksp->link_irq == -1) { | |
1617 | ks8695_init_switch(ksp); | |
1618 | ksp->dtype = KS8695_DTYPE_LAN; | |
1619 | } else if (ksp->phyiface_regs && ksp->link_irq != -1) { | |
1620 | ks8695_init_wan_phy(ksp); | |
1621 | ksp->dtype = KS8695_DTYPE_WAN; | |
1622 | } else { | |
1623 | /* No initialisation since HPNA does not have a PHY */ | |
1624 | ksp->dtype = KS8695_DTYPE_HPNA; | |
1625 | } | |
1626 | ||
1627 | /* And bring up the net_device with the net core */ | |
1628 | platform_set_drvdata(pdev, ndev); | |
1629 | ret = register_netdev(ndev); | |
1630 | ||
1631 | if (ret == 0) { | |
1632 | dev_info(ksp->dev, "ks8695 ethernet (%s) MAC: %pM\n", | |
1633 | ks8695_port_type(ksp), ndev->dev_addr); | |
1634 | } else { | |
1635 | /* Report the failure to register the net_device */ | |
1636 | dev_err(ksp->dev, "ks8695net: failed to register netdev.\n"); | |
1637 | goto failure; | |
1638 | } | |
1639 | ||
1640 | /* All is well */ | |
1641 | return 0; | |
1642 | ||
1643 | /* Error exit path */ | |
1644 | failure: | |
1645 | ks8695_release_device(ksp); | |
1646 | free_netdev(ndev); | |
1647 | ||
1648 | return ret; | |
1649 | } | |
1650 | ||
1651 | /** | |
1652 | * ks8695_drv_suspend - Suspend a KS8695 ethernet platform device. | |
1653 | * @pdev: The device to suspend | |
1654 | * @state: The suspend state | |
1655 | * | |
1656 | * This routine detaches and shuts down a KS8695 ethernet device. | |
1657 | */ | |
1658 | static int | |
1659 | ks8695_drv_suspend(struct platform_device *pdev, pm_message_t state) | |
1660 | { | |
1661 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1662 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1663 | ||
1664 | ksp->in_suspend = 1; | |
1665 | ||
1666 | if (netif_running(ndev)) { | |
1667 | netif_device_detach(ndev); | |
1668 | ks8695_shutdown(ksp); | |
1669 | } | |
1670 | ||
1671 | return 0; | |
1672 | } | |
1673 | ||
1674 | /** | |
1675 | * ks8695_drv_resume - Resume a KS8695 ethernet platform device. | |
1676 | * @pdev: The device to resume | |
1677 | * | |
1678 | * This routine re-initialises and re-attaches a KS8695 ethernet | |
1679 | * device. | |
1680 | */ | |
1681 | static int | |
1682 | ks8695_drv_resume(struct platform_device *pdev) | |
1683 | { | |
1684 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1685 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1686 | ||
1687 | if (netif_running(ndev)) { | |
1688 | ks8695_reset(ksp); | |
1689 | ks8695_init_net(ksp); | |
1690 | ks8695_set_multicast(ndev); | |
1691 | netif_device_attach(ndev); | |
1692 | } | |
1693 | ||
1694 | ksp->in_suspend = 0; | |
1695 | ||
1696 | return 0; | |
1697 | } | |
1698 | ||
1699 | /** | |
1700 | * ks8695_drv_remove - Remove a KS8695 net device on driver unload. | |
1701 | * @pdev: The platform device to remove | |
1702 | * | |
1703 | * This unregisters and releases a KS8695 ethernet device. | |
1704 | */ | |
1705 | static int __devexit | |
1706 | ks8695_drv_remove(struct platform_device *pdev) | |
1707 | { | |
1708 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1709 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1710 | ||
1711 | platform_set_drvdata(pdev, NULL); | |
31b73ab3 | 1712 | netif_napi_del(&ksp->napi); |
7a3c66e2 DS |
1713 | |
1714 | unregister_netdev(ndev); | |
1715 | ks8695_release_device(ksp); | |
1716 | free_netdev(ndev); | |
1717 | ||
1718 | dev_dbg(&pdev->dev, "released and freed device\n"); | |
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | static struct platform_driver ks8695_driver = { | |
1723 | .driver = { | |
1724 | .name = MODULENAME, | |
1725 | .owner = THIS_MODULE, | |
1726 | }, | |
1727 | .probe = ks8695_probe, | |
1728 | .remove = __devexit_p(ks8695_drv_remove), | |
1729 | .suspend = ks8695_drv_suspend, | |
1730 | .resume = ks8695_drv_resume, | |
1731 | }; | |
1732 | ||
1733 | /* Module interface */ | |
1734 | ||
1735 | static int __init | |
1736 | ks8695_init(void) | |
1737 | { | |
1738 | printk(KERN_INFO "%s Ethernet driver, V%s\n", | |
1739 | MODULENAME, MODULEVERSION); | |
1740 | ||
1741 | return platform_driver_register(&ks8695_driver); | |
1742 | } | |
1743 | ||
1744 | static void __exit | |
1745 | ks8695_cleanup(void) | |
1746 | { | |
1747 | platform_driver_unregister(&ks8695_driver); | |
1748 | } | |
1749 | ||
1750 | module_init(ks8695_init); | |
1751 | module_exit(ks8695_cleanup); | |
1752 | ||
1753 | MODULE_AUTHOR("Simtec Electronics") | |
1754 | MODULE_DESCRIPTION("Micrel KS8695 (Centaur) Ethernet driver"); | |
1755 | MODULE_LICENSE("GPL"); | |
1756 | MODULE_ALIAS("platform:" MODULENAME); | |
1757 | ||
1758 | module_param(watchdog, int, 0400); | |
1759 | MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); |